Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Diatom response to mid-Holocene climate change in Lago di Massaciuccoli (Tuscany, Italy) |
| Abstract | A sedimentary sequence from the Mediterranean coastal basin of Lago di Massaciuccoli (Tuscany, Italy) was analyzed for diatoms, covering two periods over the past ca. 7,000 years. The site was selected because it is situated in a sensitive position at the limit between Mediterranean and Central European climates and biomes. Our focus is on the impact of accelerated human activity during the recent past (water uptake in the catchment, sand extraction, wastewater discharge) and on a phase of evident change between 6,600 and 5,400 cal. BP. The diatom record suggests fresh-water conditions and rather high lake levels until ca. 6,000 years ago. The subsequent shift towards brackish conditions peaked at around 5,500 cal. BP. We relate this shift to a pervasive change towards a drier climate that has been observed elsewhere in the Mediterranean and Northern African regions, and stands in contrast to the shift towards a cooler and more humid climate in the nearby Alps (200-350 km distant) and in central Europe. Pollen and charcoal records from a previous study on the same sedimentary sequence were used to gain additional insights about the causes of the changes in the diatom assemblages and apply numerical methods to search for common trends and correlations. |
| Source | Journal of paleolimnology 40, pp. 235–245 |
| Keywords | MediterraneanHolocenediatomsclimate |
| Journal | Journal of paleolimnology |
| Editor | Kluwer Academic, Boston, Paesi Bassi |
| Year | 2008 |
| Type | Articolo in rivista |
| DOI | 10.1007/s10933-007-9154-6 |
| Authors | Marchetto A., Colombaroli D.(1), Tinner W.(1) |
| Text | 53035 2008 10.1007/s10933 007 9154 6 ISI Web of Science WOS 000257208600015 Mediterranean Holocene diatoms climate Diatom response to mid Holocene climate change in Lago di Massaciuccoli Tuscany, Italy Marchetto A., Colombaroli D. 1 , Tinner W. 1 1 Universita di Berna A sedimentary sequence from the Mediterranean coastal basin of Lago di Massaciuccoli Tuscany, Italy was analyzed for diatoms, covering two periods over the past ca. 7,000 years. The site was selected because it is situated in a sensitive position at the limit between Mediterranean and Central European climates and biomes. Our focus is on the impact of accelerated human activity during the recent past water uptake in the catchment, sand extraction, wastewater discharge and on a phase of evident change between 6,600 and 5,400 cal. BP. The diatom record suggests fresh water conditions and rather high lake levels until ca. 6,000 years ago. The subsequent shift towards brackish conditions peaked at around 5,500 cal. BP. We relate this shift to a pervasive change towards a drier climate that has been observed elsewhere in the Mediterranean and Northern African regions, and stands in contrast to the shift towards a cooler and more humid climate in the nearby Alps 200 350 km distant and in central Europe. Pollen and charcoal records from a previous study on the same sedimentary sequence were used to gain additional insights about the causes of the changes in the diatom assemblages and apply numerical methods to search for common trends and correlations. 40 articolo pubblicato 14_JOPL_2008.pdf Articolo in rivista Kluwer Academic 0921 2728 Journal of paleolimnology Journal of paleolimnology J. paleolimnol. aldo.marchetto MARCHETTO ALDO TA.P02.014.002 Impatto dei cambiamenti globali sugli ecosistemi acquatici |